Transparent Images

The transparent pixels in PNG images still have a color; you just can't see it. You can turn transparency off and see what's there by going into the color levels dialog in GIMP or whatever photo editor you use and setting the output levels for the alpha channel to 255-255. Usually there's nothing there, but sometimes there is.

>>123249It's different for each pixel. In GIMP, you can open Windows > Dockable Dialogs > Pointer and see information about the RGBA values at a particular position. And if you actually want to see all the colors, you can go into Color > Levels, select Channel: Alpha, and set the slider on Output Levels up to 255.

>>1235901. save the image2. use eyedropper on any transparent pixel3. color replacer: 100 tolerance and a big brush size4. hold right click and fill the selection5. if it affects the non-transparent area redo with another transparent pixelpic is >>123885 without transparency but due to step 5 finding a better editor is more worth

http://fotocrib.com/tools.phpis a site that performs various operations on images for you. Some of the operations ignore the transparency data, and in particular, if you don't specify an operation, it does nothing but strip the transparency.

Here's a Bash script that scans through the images linked in one of 4chan's JSON files (e.g. https://a.4cdn.org/a/catalog.json) which you pass as a command-line argument. Higher scores (above 50-100) are more likely to contain something interesting.